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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

A sample of hemoglobin is found to be 0.335% iron. What is the molar mass of hemoglobin if there are four iron atoms per molecule?

Interpretation Introduction

Interpretation: The molar mass of Hemoglobin presents in a sample with four iron atoms found to have 0.335% iron should be determined.

Concept introduction:

  • Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.
  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
  • Moles: One mole is equivalent to the mass of the substance consists same number of units equal to the atoms present in 12g of 12C.
  • From given mass of substance moles could be calculated by using the following formula,

    Molesofsubstance GivenmassofsubstanceMolecularmass

  • Mass: It is the quantitative measure of a substance. The amount of matter present in substance is expressed as mass. The S.I. unit of mass is kg.
Explanation

The given sample of hemoglobin has 0.335% iron. This represents the percentage by mass that iron occupies in the hemoglobin molecule.

Molar mass of iron is 55.847g/mol

By using the ratio of iron and its molar mass hemoglobin’s molar mass can be determined as follows,

  Molarmassofhemoglobin=55.847g/mol×1000.335 =

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